Apache Solr Reference Guide Covering Apache Solr 6.0

are set programmatically, but you could instead specify them on the java command line, as in the post.jar exa
mple above:
System.setProperty("javax.net.ssl.keyStore", "/path/to/solr-ssl.keystore.jks");
System.setProperty("javax.net.ssl.keyStorePassword", "secret");
System.setProperty("javax.net.ssl.trustStore", "/path/to/solr-ssl.keystore.jks");
System.setProperty("javax.net.ssl.trustStorePassword", "secret");
String zkHost = "127.0.0.1:2181";
CloudSolrClient server = new CloudSolrClient(zkHost);
server.setDefaultCollection("mycollection");
SolrInputDocument doc = new SolrInputDocument();
doc.addField("id", "1234");
doc.addField("name", "A lovely summer holiday");
server.add(doc);
server.commit();
Running Solr on HDFS
Solr has support for writing and reading its index and transaction log files to the HDFS distributed filesystem.
This does not use Hadoop MapReduce to process Solr data, rather it only uses the HDFS filesystem for index
and transaction log file storage. To use Hadoop MapReduce to process Solr data, see the
MapReduceIndexerTool in the Solr contrib area.
To use HDFS rather than a local filesystem, you must be using Hadoop 2.x and you will need to instruct Solr to
use the HdfsDirectoryFactory. There are also several additional parameters to define. These can be set in
one of three ways:
Pass JVM arguments to the bin/solr script. These would need to be passed every time you start Solr
with bin/solr.
Modify solr.in.sh (or solr.in.cmd on Windows) to pass the JVM arguments automatically when
using bin/solr without having to set them manually.
Define the properties in solrconfig.xml. These configuration changes would need to be repeated for
every collection, so is a good option if you only want some of your collections stored in HDFS.
Starting Solr on HDFS
Standalone Solr Instances
For standalone Solr instances, there are a few parameters you should be sure to modify before starting Solr.
These can be set in solrconfig.xml(more on that below), or passed to the bin/solr script at startup.
You need to use an HdfsDirectoryFactory and a data dir of the form hdfs://host:port/path
You need to specify an UpdateLog location of the form hdfs://host:port/path
You should specify a lock factory type of ' hdfs' or none.
If you do not modify
solrconfig.xml, you can instead start Solr on HDFS with the following command:
bin/solr start -Dsolr.directoryFactory=HdfsDirectoryFactory
-Dsolr.lock.type=hdfs
-Dsolr.data.dir=hdfs://host:port/path
-Dsolr.updatelog=hdfs://host:port/path
This example will start Solr in standalone mode, using the defined JVM properties (explained in more detail belo
w).
Apache Solr Reference Guide 6.0
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